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I. VIVO Y GRAELLS. REGULATOR FOR DYNAMO ELECTRIC MACHINES.

No. 358,133. Patented Feb. 22,1887.

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2 w h S P m h S 3 S L L E A R G Y 6 V I V P REGULATOR FOR DYNAMOELEGTRIU MACHINES.

Patented. Feb. 22, 1887.

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P. VIV6 Y GRAELLS. REGULATOR FOR DYNAMO ELECTRIC MACHINES.

No. 358,133. Patented Feb. 22, 1887;

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ATTORNEY UNITED STATES- PATENT CFFIcE.

FRANCISCO VIVC Y GRAELLS, OF BARCELONA, SPAIN.

REGULATOR FOR DYNAMO-EL ECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 358,133, datedFebruary, 22, 1887.

Application filed January 8, 1887. Serial No. 223,808. (No model.)Patented in Spain September 15. 1885, No.7,545, and {April 14, 1886, No.8,243.

To all whom it, may concern: I

Be'it known that I, FRANCISCO VIVo Y GRAELLS, a citizen of Spain,residing at Barcelona, have invented certain new and useful Apparatusfor Regulating Automatically the Intensity of the Currents in theDynamo-Electric Machines, (for which I have obtained a patent in Spain,No. 7, 545, bearing date September 18, 1885, and a patent uponimprovements, No. 8, 243, bearing date April 14,1886) of which thefollowing is a specification.

My invention relates to an apparatus for regulating the intensity of theelectric currents produced by the dynamo or magneto-electric engines byregulating their speed or number of revolutions to be in conformity withthe resistance of the circuit as it increases or decreases.

The apparatus principally consists of two cone-pulleys placed parallelwith each other, one of them being set in motion by the steamengine orother motor, driving the other one by a belt, and the latter conetransmitting motion to the dynamoeugiue. IVith two parallel cone-pulleysthe speed is varied by the sliding or shifting of the belt alongthe'surface of the cones, and the greater the circumi'erence embraced ofthe first the less the circumference embraced of the second, and viceversa,whereby as the belt is shifted in one direction or the other thenumber of revolutions of the dynamo will be increased or decreased; ofbeltguidingforks fixedtoa carrier guided in a frame placed intermediateof and parallel with the axis of the two cone-pulleys, such carrierbeing moved in one direction or another by two screw-rods journaled inthe guide-frame and turning in opposite directions, and by an anchorvibrating between two electro-magnets and a cross-beam formingjpart ofsuch anchor, and having lugs intermittently engaging the screwthreads ofone or the other screw-rod and of a spring-bar secured to or connectedwith the anchor, and provided with pawls to its ends engaging withratchet-bars, the teeth of the opposite bars being oppositely inclinedfor holding the carrier from moving while the anchor is at its centralor normal position; of an electric-cur-v go rent connection thatactuates the electro-magnets of the carrier, and that maybe either thesame produced by the dynamo or that produced by an excitative engine ina manner that the current must pass through one or the otherelectro-magnet in proportion as the main current increases or decreasesand, for that purpose, of the employmentof an amperometer, the pointerof which, by its movement to the right or left, opens or closes thecircuit to one or the other electro-magnet of the carrier, all as willbe hereinafter more fully described and specifically claimed.

In the accompanying drawings, Figure 1 represents a plan view of thedevice; Fig. 2, a longitudinal vertical section of the same on line 2 2in Fig. 1; Fig. 3, a sectional end elevation of the carrier, showing atthe same time the manner of placing the wires for establishingcommunication with the amperometer, the dynamo, and the apparatus for'resistances. Fig. 4 is a side view of the carrier, and Fig. 5 shows theamperometer on a larger scale.

Corresponding letters in the several figures of the drawings designatelike parts.

Cones M and N are mounted upon shafts A and B, placed parallel with eachother and suitable distance apart. Upon this shaft A are also mountedloose and tight pulleys Eand E for the engine-driving belt, and uponshaft 13 is mounted a pulley, R, for driving the dynamo by a belt. Abelt, j, is passed over cones M and N, transmitting motion from one tothe other, and forks H H, fixed upon carrier 1?, guide this belt 9'.

The carrier P is guided in a frame, G, placed intermediate of andparallel with the shafts A and B, and in this frame G, parallel with thedovetail guides thereof, are journaled two screw-rods, F and F, one ofwhich, F, has a pulley, p, mounted upon its overhanging end, andisdriven byabelt, S, from a pulley,p, that is mounted upon shaft A, andmotion is transmitted from screw-rod F to screw-rod F by twogear-wheels, g and g, in a manner that the two screw-rods are constantlyrotated in opposite directions.

The carrier has secured upon a plate of insulating material twoelectromagnets, I and I, placed in opposition to each other, and ananchor, m, vibrating between the two electromagnets, on a spindle, ,n,has arms 1) and 1;, so as to be T-shaped, and the ends of these arms '0and o are adapted to enter between and engage the screw-threads of therods F and F alternately, as the anchor may be attracted by one magnetor the other, but to be out of contact with the screw-rods as long asthe anchor will remain on its central or intermediate position. As soonas the anchor m swings one of its arms, 11 or 11, into the screw-threadof one of the rods, F or F, the carrier is moved by such rod in onedirection or the other. When the current does not act upon theelectro-magnets of the carrier, the latter is held stationary by meansof pawls t and t, attached to the ends of a spring-plate, T, secured tospindle n and bearing upon studs 00 and 00 of arms 0 and o of the anchorm, and of ratchetbars S S, forming part of the guide-frame G, the bar Shaving teeth oppositely inclined to the teeth of bar S. When the end 0of the lever rises, the stud a: lifts the pawl 16, disengaging it fromrack S, while pawl t is still held in engagement with rack S, the teethof which, 110 wever. are inclined in the direction that they will notretard the motion imparted by rod F to the carrier; but the pawl it willslide or ride over the same, and vice versa, when the anchor is vibratedto lift arm 1;.

Each of the electro-magnets is provided with two metal bow-plates, b andb, c and 0 connecting with the ends of its wire coi1s,and in the lowerend of each bow-plate is secured a metallic brush, a, which brushes areheld in contact with metal bars d d and e e, the cur-.

rent entering through one of these bars and returning through the otherafter acting upon the electro-magnet connected therewith.

The current from the dynamo g feeds the lights Z. h and h are branchwires connecting the amperometer with the main circuit-wires. Thiscurrent circulates uninterruptedly. A second derived current passesthrough the wire J, and if the intensity of the current through it ofthe amperometer is constant, it runs through the anchor X and thecontactplates 1' L, and finally the electro-magnet K. This current goesagain in the dynamo through wire 0. We have a closed circuit so long asthe intensity of the current through h is constant; but as soon as itincreases or decreases the circuit is opened and the current is directedto the electromagnets I or I, passing first through the electro-magnet Qand the amperometer O.

The amperometer 0 (shown in Fig. 5) is very much like those actually inuse. It differs only by its pointer D being elongated with a smallblade, f, preferably made of platinum. This blade f will bear againstthe limits V \V or Y Z, and the pointer D may be caused to assume aposition appropriate to the normal resistance of the circuit. The limitsV \V Y Z may be secured on the dial indicating the number of amperes towhich the dynamo must work. In Figs. 3 and 5 the amperometer is shownwith the limits attached, for the pointer D to oscillate betweenthirteen and fourteen amperes. The result of this arrangement is that assoon as the continuous current It increases or decreases even one-tenthpart of an ampere the pointerD will be brought in contact with thelimitsV W or Y Z. In the first case,the bladef bearing against V \V, anew circuit will be formed, whose current will be directed first to theeleetro-magnet Q, and by means of the wire U U to the metal bar 6,thence through brush a and bow-plate c to the electro-magnet I,returning through the opposite plate, 0, bar 0', and wire i. In thesecond case, the bladef coming into contact with limits Y Z, the currentpasses through wire U, plate d, electro-magnet I, plate (I, and wire 2'.Again, when the electric current passes through the electromagnet Q itattracts the anchor X, whereby the current that acted on electromagnet Kis cut at 1'. The sole object of the electro-magnet K is to act as anapparatus of resistance, and this resistance is equal to the sum of theresistances of one of the electromagnets,I or I, and of the smallelectro-magnet Q. If not so arranged, it would happen that when theelectro-magnet I or Iwould be set to work there would be an increase ofresistance in the main current, while that to the amperometer would beweakened.

If the electro-magnets I and I were actuated by a current produced by anexcitative ma chine, instead of by the main current or by a branchcurrent, then the resistance of electro-magnet K could be dispensedwith.

What I claim is- 1. In an apparatus for automatically regulating theintensity of the electric current produced by a dynamo by increasing ordecreasing its speed, the combination, with two cone-pulleys and a beltuniting them, of two forks for guiding and shifting the belt upon thecone-pulleys, two revolving screw-rods, two electro-magnets placed inopposition to each other, a carrier to which the forks are attached andwhich bears the magnets, and an anchor or armature having arms actedupon by said magnets and engaging one or the other of said rods, as setforth.

2. In an apparatus for automatically regulating the intensity of adynamobyincreasing or decreasing its speed, the combination, with twocone-pulleys, a belt connecting them, a belt-shifter, two magnets towhich said shifter is attached, and an electric circuit for energizingsaid magnets,an anchor or armature placed between said magnets andhaving arms, as described, and a pair of revolving screw-rods which areengaged separably by the arms of the anchor or armature.

3. In an apparatus for automatically regulating the intensity of thedynamo-currents, an amperometer acting as a circuit-closer,having itspointer bearing against two limits, placed on each side of the pointcorresponding to the normal intensity of the current, and directing thecurrent to either one of two electro-magnets placed upon. abelt-shifter, in

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combinationwith said magnetand belt-shifter, two electro-magnets. avibratable anchor en- 10 means for coupling the anchor of suchbeltgaging either one of two revolving screw-rods, shifter with amotion-transmitter, and with and pawls engaging ratchet-bars, allsubstantwo cone-pulleys over which the belt is shifted tially asdescribed, to operate as specified.

5 laterally substantially as set forth.

4. In an apparatus for automatically regu- FRANCISCO VIVO Y GRAELLS'lating the intensity of the dynamo-currents, Witnesses: the combinationof two conical pulleys, of a D. GERo. BOLIBAR,

carrier having secured two belt-shifting forks, SPINosA COSTELLA.

